Bath　experiments　were　conducted　to　investigate　the　shock　effect　of　different　concentration　of　sodium　acetate　and　kinds　of　organic　matters　on　anaerobic　ammonia　oxidation　(Anammox)　system,　with　the　inoculation　sludge　derived　from　a　stable　Anammox　system　for　more　than　300　days.　The　results　showed　that　under　the　initial　nitrite　concentration　of　35　mg/L　and　sodium　acetate　concentration　below　200　mg/L,　anammox　bacteria　activity　was　not　inhibited,　but　was　promoted.　The　maximum　specific　ammonia　oxidation　rate　increased　with　an　increase　in　sodium　acetate　concentration.　For　the　bath　experiments　of　different　organic　matters,　the　maximum　ammonia　oxidation　rate　was　observed　in　the　Anammox　system　fed　with　sodium　acetate,　followed　by　peptone,　glucose　and　starch.　Denitrification　was　also　associated　with　the　Anammox,　but　nitrate　reduction　rate　[0.0155~0.0442　mgN/(L·min)]　was　lower　than　ammonia　oxidation　rate　[0.1090~0.1498　mgN/(L·min)],　which　illustrated　that　Anammox　bacteria　played　a　dominant　role.　Under　the　shock　loading　of　organic　matters,　Anammox　and　denitrification　could　coordinately　remove　nitrogen　compound,　and　enhance　the　total　nitrogen　removal　efficiency,　which　made　the　effluent　quality　to　improve　to　some　extent.